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General Specification for all models
Ambient temperature: 5 to 40°C (41 - 104°F)
Fluid type:
Hydraulic oil
Fluid temperature:
DHM - 0 to 105°C (32 - 220°F)
Accuracy:
see model specifications
Construction materials
Case:
Painted mild steel
Flow block:
High tensile aluminium
Seals:
Viton as standard - EP seals on request
Battery Details
PP3 9 volt Alkaline (IEC6LR61, ANSI/NEDA 1604A)
Dimensions and Weight
Model
Height
Width
Depth
Weight
DHM404
240 mm
200 mm
200 mm
6.5 kg
9.45 inches
7.87 inches
7.87 inches
14.33 lbs
DHM804
245 mm
225 mm
225 mm
10 kg
9.65 inches
8.86 inches
8.86 inches
22 lbs
Fluid viscosity
The performance of the tester can be affected by the viscosity of the fluid measured. Our
testers are calibrated at a mean viscosity of 21 cSt. The shaded area of the table shows the
range of viscosities that can be measured by a tester with standard calibration with minimal
effect on the accuracy (less than ± 1% FS).
Table showing kinematic viscosity (cSt) of different mineral
oils at specific temperatures
Fluid type
Temp °C
ISO15 ISO22 ISO32 ISO37 ISO46 ISO68
0
85.9 165.6 309.3 449.9 527.6 894.3
10
49.0 87.0 150.8 204.7 244.9 393.3
20
30.4 50.5 82.2 105.5 127.9 196.1
30
20.1 31.6 48.8 59.8 73.1 107.7
40
14.0 21.0 31.0 36.6 44.9 63.9
50
10.2 14.7 20.8 23.9 29.4 40.5
60
7.7 10.7 14.7 16.5 20.2 27.2
70
6.0 8.1 10.9 12.0 14.6 19.2
80
4.8 6.4 8.4 9.1 11.1 14.3
90
4.0 5.2 6.6 7.2 8.7 11.1
100
3.3 4.3 5.5 6.0 7.1 8.9
ISO 15, 22, 32, 46 and 68 based on typical figures for the Esso Nuto range of
HM oils. ISO 37 based on Shell Tellus HM oil.